Telegraph-sounder.



No. 629,645. Patented July 25, I899.

' J. S. BAYNARD.

TELEGRAPH SUUNDER.

(Application filed Apr. 22, 1898.)

(Nu'lIodeL) A 77'0HNE Y S.

WITNESSES iiwrrnn ST TES PATENT @rrrcm JAMES SWINTON BA YNARD, OF NEWYORK, N. Y., ASSIGNOR TO REUBEN L. PRITCHARD, OF SAME PLACE.

TELEGRAPH-seminars;

SPECIFICATION forming part of Letters Patent No. 629,645, dated July 25,1899.

Application filed April 22, 1898.

To 11/] 10/1/1111. it Hwy I'UILUII'IL;

lie it known that 1, JAMES SwmToN BAY- NARD, of the city of New York,borough of Manhattan, in the county and State of New York, have inventedcertain new and useful Improvements in Telegraph Sounders, of which thefollowing is a full, clear, and exact description.

The invention relates to telegraph-sounders such as shown and describedin the Letters Patent of the United States No. 357,789, granted to R. C.Rutherford on February 15, 1887.

The object of the invention is to provide certain new and usefulimprovements in telegraphsonnders,whereby the messages are received verydistinctly by the operator and without confusion of elementary motions,at the same time permitting such minute adjustment that the soundsproduced are not in the least harsh or disagreeable to the car,

.as is so frequently the case in sounders as heretofore constructed/ Thein vention consists of novel features and parts and combinations of thesame, as will be described hereinafter and then pointed out in theclaims.

, Reference is to be had to theaccompan yin g drawings, forming a partof this specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure l is a sectional plan view of the im provement. Fig. 2 is asectional side elevation of the same on the line 2 2 of Fig. 1. Fig. 3is a transverse section of the same on the line 3 3 of Fig. 1, and Fig.i is a detail view illustratinga modification in the construction of thecores of the electromagnet.

The improved telegraph-sounder is provided with a casing, preferablymade of hard rubber or like material and formed of two sections A and B,of which the bottom section A is provided with an annular flange A,formed with an external thread engaged by an internal thread on the sideB of the other section or cover B. In the flange A are formed openings Aadapted to register with corresponding openings B in the side B of thecover B to emit the sounds to a greater or lesser degree, according tothe position of $eria1N0. 678,449. (No modelfl the side B on the flangeAthat is, by screwing the cover 13 more or less on the flange A thesound-emitting openings A and B may be brought more or less in registerwith each other for the purpose mentioned.

In the bottom of the section A is mounted an electromagnet C C, havingsquare cores G G over which operates an armature-lever D, fulcrumed onpins E, projecting from the core (3 into apertures D, formed in thearmature-lever D. Now by reference to Figs. 1 and 3 it will be seen thatthe fulcrum-forming pins E are located near the outer edge of thecore 0so that the armature-lever is at all times in contact with this corenear the outer edge thereof and is free to swing downward in contactwith the surfaces of both cores C C when attracted by the electromagnetin the usual manner.

The armature-lever D is provided with an extension D on which is securedone end of a spring F, secured at its other end on an arm G, secured atone end at G to the bottom section A, the other end of said arm beingengaged by a screw G screwing in the section A and extending to theoutside thereof to be within convenient reach of the operator. Then theoperator turns the head G3 of the screw G the arm G is moved inward oroutward to decrease or increase the tension of the spring F, as desired.

In order to deaden all noise incident to the action of the spring F whenthe armaturelever D is attracted or released, I prefer to cover the saidspring with a casing H, of'cotton or other suitable sound-deadeningmaterial. The upward-swinging motion of the armature-lever D whenreleased by the electromagnet is limited by a screw I, of brass or othermaterial diiferent from the soft-metal cores C C The screw I is securedin an arm J, having an angular extension J, fitted to slide in a bearingK,secured to the section A. A rod L is mounted to turn loosely in thearm J and is provided with a screw-thread L, screwing in-a nut N,carried, preferably, on the bearing K,the threaded portion of the rod Lextending to the outside of the casing,there being a knob L on theextreme outer end of the rod; Now it is evident that when the toooperator turns the knob L the SOlGW-lutl L moves the arm J outward orinward from or toward the armature-lever D to regulate the throw of thearmature-lever D accordingly. The arm J may be moved outward to such anextent that the head of the screw I abuts against the inside of thecover B, so that the force of the blow of the armaturedever D on thescrew I is transmitted to the cover B, and as this is the widest rangeofthe armature-lever the sound produced is very loud and is mainlydesired when the device is hung up for receiving calls or signals.

The casing'is provided with the usual binding-posts 0, connected withthe coils of the electroinagnet and having a receiving-cable l of usualform.

The operation is as follows: \Vhen the sounder is hung up, then the armJ is'in its outermost position, the head of the screw being inengagement with the cover I), so that when a signal or call is sentthrough the inst ument a veryloud sound is produced, owing to the'fullforce of the blow of the armatureJeVcrbeing exerted on the core C andthe screw 1. The operator now turns the rod L, so as to move the arm Jinwardly and reduce the movement of the armature-lever D to minim um forreceiving secret messages, the sounds being very distinct and clear,especially as the sound emitted by the lever D striking the cores 0 O isdifferent from that when the lever D strikes the screw I on its returnrelease movement. Thus by the arrangement described corlision ofelementary motions is completely avoided, and the sounds are not in theleast harsh or disagreeable to the ear.

The entire device is very simple and durable in construction and is notliable to get outof order.

In order to increase the d-iiference in sound on the attraction andrelease of the armaturelever D, I may provide the cores 0 and C withhardwood plugs C", extending a hairs breadth above the surface of thesoft-iron cores. Fig. 4. shows one of the cores havingthis modifiedconstruction.

The arm J, bearing K, screw I, and rod L form an adjustable back-stopfor the armature-lever to regulate the loudness of the sounds on thearmature-lever striking the cores on the attraction of the lever and thescrew I on the release of the armature-lever.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent 1. A telegraph sounder of the class de scribed,provided with an electromagnet, a spring-pressed armature-lever for thesame, an adjustable back-stop for said armature-lever, and of adifferent material than the electromagnet-coresfior prod ucingdistinguishing sounds upon the attraction and release of thearmature-lever, the loudness of the soundboin g governed by the positionof the adjustable scribed.

back-stop, and a resonant casing containing said electromagnet, armattire-lever and backstop, the adjustment of the latter permitting ofcontacting the back-stop with the casing at the point farthest from thearmature-lever, to transmit the sound given by the armaturelever to theback-stop to the casing,-for pro; ducing sound calls or signals,substantially as-shown and described.

2. A telegraph sounder of the class described, provided with anelectromagnet, an armature-lever for the same, a back-stop for thearmatu re-lever, a spring for the armaturelever, and a casing of asound-deadening ma terial and inclosing said spring, substantially asshown and described.

3. A telegraphsounder,provided with a casing made in twosectionsscrewing one on the other, and having openings in the threadedparts and adapted to register witheach other, substantially as shown anddescribed.

4. A telegraph sounder of the class dcscribed provided with anelectromagnet, and a spring-pressed armature-lever for the same andfulcru med on one of the cores of the electroinugnet and adapted whenattracted to sound on the other core, the cores of the said magnet beingprovided with plugs of a hard material and extending slightlyabove thesurface of the soft-iron cores, substantiallyas described.

5. A telegraph sounder of the class described provided with anelectromagnet, a springpresscd armature-lever for the same fulcrnmed onone of the cores of the electr cmagnet and adapted when attracted tosound on the other core, an adjustable back-stop for the armature-leverand a resonant casing containing said ele'ctromagnet, armature-lever andback-stop, the said back-st op being adapted to be adjusted to permit ofcontacting the same with the casing, substantially as de- 6.A'telegraph-sounder provided with a casing formed in two sections, thebottom sect on being formed with an annular flange to which the uppersection or cover is adjustably secured, the flange of the lower-sectionand the side of the upper section being formed with openings adapted tobe brought niore or less into register with each other, substantially asdescribed.

7. A telegraph-sounder bf the class described provided with anelectromagnehan armature-lever for the same, a back-stop for saidarmature-lever, and a resonant cas ng containing said electromagnet,armaturedever and back-stop, the said back-stop being adapted to beadjusted to mo e the same nto contact with the inside of the resonantcasing, as and for the purpose set forth.

JAMES SWINTON BAYNARD.

Witnesses:

J osnrn II. Smrronn, JAMES A. Darron.

